阅读理解。
Tom was a helpful boy. Every Sunday morning, he walked to the newspaper kiosk (报刊亭) at
the supermarket to buy a newspaper for his dad. He liked to leave the house early as it was more
peaceful then, with fewer cars in the streets.
One Sunday morning, when Tom arrived at the supermarket, he saw his neighbour, old Mrs.
Jackson. She was choosing apples at the fruit shop. Tom greeted her and then went to get his
newspaper.
As he was leaving, Tom saw Mrs. Jackson walking in front of him. Her bag looked very heavy.
"Would you like me to carry that for you, Mrs. Jackson?" Tom asked.
"What a helpful boy you are, Tom! Thank you. It is heavy," she replied.
Tom picked up the heavy bag and began walking slowly home with Mrs. Jackson. The bag
seemed to grow heavier with each step. Then, just as they were about to cross the road, it fell
off Tom's hand and dropped on the hard road!
"Oh, no!" cried Tom. "The fruit will be squashed (压扁)."
Mrs. Jackson looked into the bag. "Yes, the fruit does look a bit squashed. But don't worry,
Tom. I like fruit juice. I'll just make juice instead. Call at my house this afternoon. We'll have some
delicious cold fruit juice together!" she said with a wide smile.
1. Tom went to the newspaper kiosk every Sunday morning to buy a newspaper for _____.
A. his dad
B. his mum
C. his neighbour
D. himself
2. Mrs. Jackson was ______ when Tom arrived at the supermarket.
A. reading a newspaper
B. buying some apples
C. carrying a big basket
D. making some juice
3. The underlined sentence " The bag seemed to grow heavier with each step " in the passage
means _____.
A. the bag became heavier and heavier on their way home
B. Tom was strong enough to carry the bag easily
C. Tom was tired and didn't want to carry the bag any more
D. the bag was so heavy that Tom couldn't carry it easily
4. We can infer (推断) from the last paragraph that Mrs. Jackson will _____ in the afternoon.
A. buy some delicious juice for Tom
B. sell the squashed apples to others
C. ask Tom to make some juice for her
D. make some juice and share it with Tom
KOH+I2+O2(未配平），下列说法正确的是（ ）
mol的氧原子化合价发生了变化